13050013721 has 2 divisors, whose sum is σ = 13050013722. Its totient is φ = 13050013720.

The previous prime is 13050013699. The next prime is 13050013727. The reversal of 13050013721 is 12731005031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11286937600 + 1763076121 = 106240^2 + 41989^2 .

It is a cyclic number.

It is not a de Polignac number, because 13050013721 - 2⁶ = 13050013657 is a prime.

It is not a weakly prime, because it can be changed into another prime (13050013727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6525006860 + 6525006861.

It is an arithmetic number, because the mean of its divisors is an integer number (6525006861).

Almost surely, 2^13050013721 is an apocalyptic number.

It is an amenable number.

13050013721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13050013721 is an equidigital number, since it uses as much as digits as its factorization.

13050013721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

Adding to 13050013721 its reverse (12731005031), we get a palindrome (25781018752).

The spelling of 13050013721 in words is "thirteen billion, fifty million, thirteen thousand, seven hundred twenty-one".